1/* 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include <sys/cdefs.h> 35#ifndef lint 36__used static char const copyright[] = 37"@(#) Copyright (c) 1989, 1993, 1994\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39#endif /* not lint */ 40 41#ifndef lint 42#if 0 43static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94"; 44#endif 45#endif /* not lint */ 46#include <sys/cdefs.h> 47__RCSID("$FreeBSD: src/bin/chmod/chmod.c,v 1.27 2002/08/04 05:29:13 obrien Exp $"); 48 49#include <sys/types.h> 50#include <sys/stat.h> 51 52#include <err.h> 53#include <errno.h> 54#include <fts.h> 55#include <limits.h> 56#include <stdio.h> 57#include <stdlib.h> 58#include <string.h> 59#include <unistd.h> 60 61#ifdef __APPLE__ 62#include "chmod_acl.h" 63 64#endif /*__APPLE__*/ 65 66int fflag = 0; 67 68int main(int, char *[]); 69void usage(void); 70 71int 72main(int argc, char *argv[]) 73{ 74 FTS *ftsp = NULL; 75 FTSENT *p = NULL; 76 mode_t *set = NULL; 77 long val = 0; 78 int oct = 0; 79 int Hflag, Lflag, Pflag, Rflag, ch, fts_options, hflag, rval; 80 int vflag; 81 char *ep, *mode; 82 mode_t newmode, omode; 83#ifdef __APPLE__ 84 unsigned int acloptflags = 0; 85 long aclpos = -1; 86 int inheritance_level = 0; 87 int index = 0; 88 size_t acloptlen = 0; 89 int ace_arg_not_required = 0; 90 acl_t acl_input = NULL; 91#endif /* __APPLE__*/ 92 int (*change_mode)(const char *, mode_t); 93 94 set = NULL; 95 omode = 0; 96 Hflag = Lflag = Pflag = Rflag = fflag = hflag = vflag = 0; 97#ifndef __APPLE__ 98 while ((ch = getopt(argc, argv, "HLPRXfghorstuvwx")) != -1) 99#else 100 while ((ch = getopt(argc, argv, "ACEHILNPRVXafghinorstuvwx")) != -1) 101#endif 102 switch (ch) { 103 case 'H': 104 Hflag = 1; 105 Lflag = 0; 106 Pflag = 0; 107 break; 108 case 'L': 109 Lflag = 1; 110 Hflag = 0; 111 Pflag = 0; 112 break; 113 case 'P': 114 Hflag = Lflag = 0; 115 Pflag = 1; 116 break; 117 case 'R': 118 Rflag = 1; 119 break; 120 case 'f': 121 fflag = 1; 122 break; 123 case 'h': 124 /* 125 * In System V (and probably POSIX.2) the -h option 126 * causes chmod to change the mode of the symbolic 127 * link. 4.4BSD's symbolic links didn't have modes, 128 * so it was an undocumented noop. In FreeBSD 3.0, 129 * lchmod(2) is introduced and this option does real 130 * work. 131 */ 132 hflag = 1; 133 break; 134#ifdef __APPLE__ 135 case 'a': 136 if (argv[optind - 1][0] == '-' && 137 argv[optind - 1][1] == ch) 138 --optind; 139 goto done; 140 case 'A': 141// acloptflags |= ACL_FLAG | ACL_TO_STDOUT; 142// ace_arg_not_required = 1; 143 errx(1, "-A not implemented"); 144 goto done; 145 case 'E': 146 acloptflags |= ACL_FLAG | ACL_FROM_STDIN; 147 goto done; 148 case 'C': 149 acloptflags |= ACL_FLAG | ACL_CHECK_CANONICITY; 150 ace_arg_not_required = 1; 151 goto done; 152 case 'i': 153 acloptflags |= ACL_FLAG | ACL_REMOVE_INHERIT_FLAG; 154 ace_arg_not_required = 1; 155 goto done; 156 case 'I': 157 acloptflags |= ACL_FLAG | ACL_REMOVE_INHERITED_ENTRIES; 158 ace_arg_not_required = 1; 159 goto done; 160 case 'n': 161 acloptflags |= ACL_FLAG | ACL_NO_TRANSLATE; 162 break; 163 case 'N': 164 acloptflags |= ACL_FLAG | ACL_CLEAR_FLAG; 165 ace_arg_not_required = 1; 166 goto done; 167 case 'V': 168// acloptflags |= ACL_FLAG | ACL_INVOKE_EDITOR; 169// ace_arg_not_required = 1; 170 errx(1, "-V not implemented"); 171 goto done; 172#endif /* __APPLE__ */ 173 /* 174 * XXX 175 * "-[rwx]" are valid mode commands. If they are the entire 176 * argument, getopt has moved past them, so decrement optind. 177 * Regardless, we're done argument processing. 178 */ 179 case 'g': case 'o': case 'r': case 's': 180 case 't': case 'u': case 'w': case 'X': case 'x': 181 if (argv[optind - 1][0] == '-' && 182 argv[optind - 1][1] == ch && 183 argv[optind - 1][2] == '\0') 184 --optind; 185 goto done; 186 case 'v': 187 vflag++; 188 break; 189 case '?': 190 default: 191 usage(); 192 } 193done: argv += optind; 194 argc -= optind; 195 196#ifdef __APPLE__ 197 if (argc < ((acloptflags & ACL_FLAG) ? 1 : 2)) 198 usage(); 199 if (!Rflag && (Hflag || Lflag || Pflag)) 200 warnx("options -H, -L, -P only useful with -R"); 201#else /* !__APPLE__ */ 202 if (argc < 2) 203 usage(); 204#endif /* __APPLE__ */ 205 206#ifdef __APPLE__ 207 if (!(acloptflags & ACL_FLAG) && ((acloptlen = strlen(argv[0])) > 1) && (argv[0][1] == 'a')) { 208 acloptflags |= ACL_FLAG; 209 switch (argv[0][0]) { 210 case '+': 211 acloptflags |= ACL_SET_FLAG; 212 break; 213 case '-': 214 acloptflags |= ACL_DELETE_FLAG; 215 break; 216 case '=': 217 acloptflags |= ACL_REWRITE_FLAG; 218 break; 219 default: 220 acloptflags &= ~ACL_FLAG; 221 goto apnoacl; 222 } 223 224 if (argc < 3) 225 usage(); 226 227 if (acloptlen > 2) { 228 for (index = 2; index < acloptlen; index++) { 229 switch (argv[0][index]) { 230 case '#': 231 acloptflags |= ACL_ORDER_FLAG; 232 233 if (argc < ((acloptflags & ACL_DELETE_FLAG) 234 ? 3 : 4)) 235 usage(); 236 argv++; 237 argc--; 238 errno = 0; 239 aclpos = strtol(argv[0], &ep, 0); 240 241 if (aclpos > ACL_MAX_ENTRIES 242 || aclpos < 0) 243 errno = ERANGE; 244 if (errno || *ep) 245 errx(1, "Invalid ACL entry number: %ld", aclpos); 246 if (acloptflags & ACL_DELETE_FLAG) 247 ace_arg_not_required = 1; 248 249 goto apdone; 250 case 'i': 251 acloptflags |= ACL_INHERIT_FLAG; 252 /* The +aii.. syntax to specify 253 * inheritance level is rather unwieldy, 254 * find an alternative. 255 */ 256 inheritance_level++; 257 if (inheritance_level > 1) 258 warnx("Inheritance across more than one generation is not currently supported"); 259 if (inheritance_level >= MAX_INHERITANCE_LEVEL) 260 goto apdone; 261 break; 262 default: 263 errno = EINVAL; 264 usage(); 265 } 266 } 267 } 268apdone: 269 argv++; 270 argc--; 271 } 272apnoacl: 273#endif /*__APPLE__*/ 274 275 if (Rflag) { 276 fts_options = FTS_PHYSICAL; 277 if (hflag) 278 errx(1, 279 "the -R and -h options may not be specified together."); 280 if (Hflag) 281 fts_options |= FTS_COMFOLLOW; 282 if (Lflag) { 283 fts_options &= ~FTS_PHYSICAL; 284 fts_options |= FTS_LOGICAL; 285 } 286 } else 287 fts_options = hflag ? FTS_PHYSICAL : FTS_LOGICAL; 288 289 if (hflag) 290 change_mode = lchmod; 291 else 292 change_mode = chmod; 293#ifdef __APPLE__ 294 if (acloptflags & ACL_FROM_STDIN) { 295 ssize_t readval = 0; 296 size_t readtotal = 0; 297 298 mode = (char *) malloc(MAX_ACL_TEXT_SIZE); 299 300 if (mode == NULL) 301 err(1, "Unable to allocate mode string"); 302 /* Read the ACEs from STDIN */ 303 do { 304 readtotal += readval; 305 readval = read(STDIN_FILENO, mode + readtotal, 306 MAX_ACL_TEXT_SIZE); 307 } while ((readval > 0) && (readtotal <= MAX_ACL_TEXT_SIZE)); 308 309 if (0 == readtotal) 310 errx(1, "-E specified, but read from STDIN failed"); 311 else 312 mode[readtotal - 1] = '\0'; 313 --argv; 314 } 315 else 316#endif /* __APPLE */ 317 mode = *argv; 318 319#ifdef __APPLE__ 320 if ((acloptflags & ACL_FLAG)) { 321 322 /* Are we deleting by entry number, verifying 323 * canonicity or performing some other operation that 324 * does not require an input entry? If so, there's no 325 * entry to convert. 326 */ 327 if (ace_arg_not_required) { 328 --argv; 329 } 330 else { 331 /* Parse the text into an ACL*/ 332 acl_input = parse_acl_entries(mode); 333 if (acl_input == NULL) { 334 errx(1, "Invalid ACL specification: %s", mode); 335 } 336 } 337 } 338 else { 339#endif /* __APPLE__*/ 340 if (*mode >= '0' && *mode <= '7') { 341 errno = 0; 342 val = strtol(mode, &ep, 8); 343 if (val > USHRT_MAX || val < 0) 344 errno = ERANGE; 345 if (errno) 346 err(1, "Invalid file mode: %s", mode); 347 if (*ep) 348 errx(1, "Invalid file mode: %s", mode); 349 omode = (mode_t)val; 350 oct = 1; 351 } else { 352 if ((set = setmode(mode)) == NULL) 353 errx(1, "Invalid file mode: %s", mode); 354 oct = 0; 355 } 356#ifdef __APPLE__ 357 } 358#endif /* __APPLE__*/ 359 if ((ftsp = fts_open(++argv, fts_options, 0)) == NULL) 360 err(1, "fts_open"); 361 for (rval = 0; (p = fts_read(ftsp)) != NULL;) { 362 switch (p->fts_info) { 363 case FTS_D: 364 if (!Rflag) 365 (void)fts_set(ftsp, p, FTS_SKIP); 366 break; 367 case FTS_DNR: /* Warn, chmod, continue. */ 368 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 369 rval = 1; 370 break; 371 case FTS_DP: /* Already changed at FTS_D. */ 372 continue; 373 case FTS_NS: 374 if (acloptflags & ACL_FLAG) /* don't need stat for -N */ 375 break; 376 case FTS_ERR: /* Warn, continue. */ 377 warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); 378 rval = 1; 379 continue; 380 case FTS_SL: /* Ignore. */ 381 case FTS_SLNONE: 382 /* 383 * The only symlinks that end up here are ones that 384 * don't point to anything and ones that we found 385 * doing a physical walk. 386 */ 387 if (!hflag) 388 continue; 389 /* else */ 390 /* FALLTHROUGH */ 391 default: 392 break; 393 } 394#ifdef __APPLE__ 395/* If an ACL manipulation option was specified, manipulate */ 396 if (acloptflags & ACL_FLAG) { 397 if (0 != modify_file_acl(acloptflags, p->fts_accpath, acl_input, (int)aclpos, inheritance_level, !hflag)) 398 rval = 1; 399 } 400 else { 401#endif /* __APPLE__ */ 402 newmode = oct ? omode : getmode(set, p->fts_statp->st_mode); 403 if ((newmode & ALLPERMS) == (p->fts_statp->st_mode & ALLPERMS)) 404 continue; 405 if ((*change_mode)(p->fts_accpath, newmode) && !fflag) { 406 warn("Unable to change file mode on %s", p->fts_path); 407 rval = 1; 408 } else { 409 if (vflag) { 410 (void)printf("%s", p->fts_accpath); 411 412 if (vflag > 1) { 413 char m1[12], m2[12]; 414 415 strmode(p->fts_statp->st_mode, m1); 416 strmode((p->fts_statp->st_mode & 417 S_IFMT) | newmode, m2); 418 419 (void)printf(": 0%o [%s] -> 0%o [%s]", 420 p->fts_statp->st_mode, m1, 421 (p->fts_statp->st_mode & S_IFMT) | 422 newmode, m2); 423 } 424 (void)printf("\n"); 425 } 426 427 } 428#ifdef __APPLE__ 429 } 430#endif /* __APPLE__*/ 431 } 432 if (errno) 433 err(1, "fts_read"); 434#ifdef __APPLE__ 435 if (acl_input) 436 acl_free(acl_input); 437 if (mode && (acloptflags & ACL_FROM_STDIN)) 438 free(mode); 439 440#endif /* __APPLE__ */ 441 if (set) 442 free(set); 443 exit(rval); 444} 445 446void 447usage(void) 448{ 449#ifdef __APPLE__ 450 (void)fprintf(stderr, 451 "usage:\tchmod [-fhv] [-R [-H | -L | -P]] [-a | +a | =a [i][# [ n]]] mode|entry file ...\n" 452 "\tchmod [-fhv] [-R [-H | -L | -P]] [-E | -C | -N | -i | -I] file ...\n"); /* add -A and -V when implemented */ 453#else 454 (void)fprintf(stderr, 455 "usage: chmod [-fhv] [-R [-H | -L | -P]] mode file ...\n"); 456#endif /* __APPLE__ */ 457 exit(1); 458} 459